13. Basic CentOS 8 Firewall Configuration with firewalld
A firewall is a vital component in protecting a computer system or network of computers from external attack (typically from an external source via an internet connection). Any computer connected directly to an internet connection must run a firewall to protect against malicious activity. Similarly, any internal network must have some form of firewall between it and an external internet connection.
All Linux distributions are provided with a firewall solution of some form. In the case of CentOS 8 this takes the form of a service named firewalld.
While the subject of firewall configuration can be complex, fortunately CentOS 8 provides command-line, web-based and graphical tools that ease ...
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